======================================
| [   25.423532][  T234] 1 lock held by restore_ipv6/234:
| [ 25.423676][ T234] #0: ffff888006071e98 (sk_lock-AF_INET6){+.+.}-{0:0}, at: do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
| [   25.423981][  T234]
| [   25.423981][  T234] stack backtrace:
[   25.424614][  T234] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   25.424930][  T234] Call Trace:
[   25.425047][  T234]  <TASK>
[ 25.425131][ T234] dump_stack_lvl (lib/dump_stack.c:123) 
[ 25.425280][ T234] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 25.425431][ T234] tcp_ao_copy_mkts_to_user (net/ipv4/tcp_ao.c:2232 (discriminator 7)) 
[ 25.425579][ T234] ? mark_held_locks (kernel/locking/lockdep.c:4321) 
[ 25.425731][ T234] ? __pfx_tcp_ao_copy_mkts_to_user (net/ipv4/tcp_ao.c:2106) 
[ 25.425911][ T234] ? stack_depot_save_flags (lib/stackdepot.c:664) 
[ 25.426062][ T234] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 25.426207][ T234] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 25.426354][ T234] ? kfree (mm/slub.c:4579 mm/slub.c:4727) 
[ 25.426465][ T234] ? tcp_ao_parse_crypto (./include/net/tcp_ao.h:67 net/ipv4/tcp_ao.c:1436) 
[ 25.426640][ T234] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 25.426796][ T234] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5827) 
[ 25.426944][ T234] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 25.427094][ T234] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 25.427237][ T234] ? do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
[ 25.427386][ T234] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 25.427532][ T234] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 25.427652][ T234] ? do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
[ 25.427798][ T234] do_tcp_getsockopt (net/ipv4/tcp.c:4631) 
[ 25.427945][ T234] ? __pfx_do_tcp_getsockopt (net/ipv4/tcp.c:4300) 
[ 25.428092][ T234] ? tcp_ao_add_cmd (net/ipv4/tcp_ao.c:1737) 
[ 25.428256][ T234] ? release_sock (net/core/sock.c:3630) 
[ 25.428399][ T234] ? reacquire_held_locks (kernel/locking/lockdep.c:5350) 
[ 25.428542][ T234] ? release_sock (net/core/sock.c:3630) 
[ 25.428690][ T234] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 25.428835][ T234] ? validate_chain (kernel/locking/lockdep.c:3797 kernel/locking/lockdep.c:3817 kernel/locking/lockdep.c:3872) 
[ 25.428979][ T234] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 25.429127][ T234] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 25.429274][ T234] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) 
[ 25.429420][ T234] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 25.429562][ T234] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 25.429676][ T234] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 25.429831][ T234] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 25.429988][ T234] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 25.430134][ T234] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) 
[ 25.430280][ T234] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 25.430422][ T234] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 25.430566][ T234] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 25.430713][ T234] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) 
[ 25.430855][ T234] ? __might_fault (mm/memory.c:6705 mm/memory.c:6698) 
[ 25.431002][ T234] tcp_getsockopt (net/ipv4/tcp.c:4673 net/ipv4/tcp.c:4664) 
[ 25.431151][ T234] do_sock_getsockopt (net/socket.c:2396) 
[ 25.431297][ T234] ? __fget_files (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 fs/file.c:1006) 
[ 25.431442][ T234] ? __pfx_do_sock_getsockopt (net/socket.c:2374) 
[ 25.431593][ T234] ? fdget (fs/file.c:1121 fs/file.c:1128) 
[ 25.431707][ T234] __sys_getsockopt (./include/linux/file.h:35 net/socket.c:2428) 
[ 25.431853][ T234] ? __sys_setsockopt (net/socket.c:2360) 
[ 25.432001][ T234] ? __pfx___sys_getsockopt (net/socket.c:2415) 
[ 25.432149][ T234] ? __pfx___sys_socket (net/socket.c:1712) 
[ 25.432299][ T234] __x64_sys_getsockopt (net/socket.c:2432) 
[ 25.432443][ T234] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 25.432624][ T234] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 25.432772][ T234] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   25.432949][  T234] RIP: 0033:0x7f34232c446e
[ 25.433107][ T234] Code: 1f 44 00 00 48 8b 15 91 99 0a 00 f7 d8 64 89 02 b8 ff ff ff ff eb b8 0f 1f 44 00 00 f3 0f 1e fa 49 89 ca b8 37 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 0a c3 66 0f 1f 84 00 00 00 00 00 48 8b 15 59
All code
========
   0:	1f                   	(bad)
   1:	44 00 00             	add    %r8b,(%rax)
   4:	48 8b 15 91 99 0a 00 	mov    0xa9991(%rip),%rdx        # 0xa999c
   b:	f7 d8                	neg    %eax
   d:	64 89 02             	mov    %eax,%fs:(%rdx)
  10:	b8 ff ff ff ff       	mov    $0xffffffff,%eax
  15:	eb b8                	jmp    0xffffffffffffffcf
  17:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  1c:	f3 0f 1e fa          	endbr64
  20:	49 89 ca             	mov    %rcx,%r10
  23:	b8 37 00 00 00       	mov    $0x37,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 0a                	ja     0x3c
  32:	c3                   	ret
  33:	66 0f 1f 84 00 00 00 	nopw   0x0(%rax,%rax,1)
  3a:	00 00 
  3c:	48                   	rex.W
  3d:	8b                   	.byte 0x8b
  3e:	15                   	.byte 0x15
  3f:	59                   	pop    %rcx

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 0a                	ja     0x12
   8:	c3                   	ret
   9:	66 0f 1f 84 00 00 00 	nopw   0x0(%rax,%rax,1)
  10:	00 00 
  12:	48                   	rex.W
  13:	8b                   	.byte 0x8b
  14:	15                   	.byte 0x15
  15:	59                   	pop    %rcx
[   25.433608][  T234] RSP: 002b:00007fffc3055a18 EFLAGS: 00000246 ORIG_RAX: 0000000000000037
[   25.433828][  T234] RAX: ffffffffffffffda RBX: 00007fffc3055ce0 RCX: 00007f34232c446e
[   25.434046][  T234] RDX: 0000000000000029 RSI: 0000000000000006 RDI: 0000000000000009
[   25.434259][  T234] RBP: 00007fffc3055a30 R08: 00007fffc3055a2c R09: 0000000000000064
[   25.434474][  T234] R10: 00007fffc3055a30 R11: 0000000000000246 R12: 0000000000000009
[   25.434688][  T234] R13: 0000000000000064 R14: 0000000000000080 R15: 0000000000000064
| [   25.438217][  T241] 1 lock held by restore_ipv6/241:
| [ 25.438362][ T241] #0: ffff888006071098 (sk_lock-AF_INET6){+.+.}-{0:0}, at: inet_stream_connect (net/ipv4/af_inet.c:748) 
| [   25.438631][  T241]
| [   25.438631][  T241] stack backtrace:
[   25.439065][  T241] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   25.439386][  T241] Call Trace:
[   25.439500][  T241]  <TASK>
[ 25.439580][ T241] dump_stack_lvl (lib/dump_stack.c:123) 
[ 25.439732][ T241] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 25.439883][ T241] __tcp_ao_do_lookup.part.0 (net/ipv4/tcp_ao.c:208) 
[ 25.440043][ T241] tcp_ao_do_lookup (net/ipv4/tcp_ao.c:200 net/ipv4/tcp_ao.c:222) 
[ 25.440189][ T241] tcp_connect (net/ipv4/tcp_output.c:4114) 
[ 25.440335][ T241] ? rt6_get_cookie (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 ./include/net/ip6_fib.h:312) 
[ 25.440494][ T241] tcp_v6_connect (net/ipv6/tcp_ipv6.c:333) 
[ 25.440649][ T241] ? __pfx_tcp_v6_connect (net/ipv6/tcp_ipv6.c:137) 
[ 25.440797][ T241] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5827) 
[ 25.440942][ T241] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 25.441097][ T241] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 25.441245][ T241] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 25.441362][ T241] __inet_stream_connect (net/ipv4/af_inet.c:677) 
[ 25.441508][ T241] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 25.441692][ T241] inet_stream_connect (net/ipv4/af_inet.c:749) 
[ 25.441840][ T241] __sys_connect (net/socket.c:2071 net/socket.c:2088) 
[ 25.441988][ T241] ? __pfx___sys_connect (net/socket.c:2078) 
[ 25.442133][ T241] ? do_fcntl (fs/fcntl.c:473) 
[ 25.442250][ T241] ? __fget_files (fs/file.c:1009) 
[ 25.442396][ T241] ? __pfx___rseq_handle_notify_resume (kernel/rseq.c:316) 
[ 25.442585][ T241] __x64_sys_connect (net/socket.c:2095) 
[ 25.442732][ T241] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 25.442882][ T241] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   25.443061][  T241] RIP: 0033:0x7f34232c440b
[ 25.443214][ T241] Code: 83 ec 18 89 54 24 0c 48 89 34 24 89 7c 24 08 e8 eb c7 f4 ff 8b 54 24 0c 48 8b 34 24 41 89 c0 8b 7c 24 08 b8 2a 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 08 e8 41 c8 f4 ff 8b 44
All code
========
   0:	83 ec 18             	sub    $0x18,%esp
   3:	89 54 24 0c          	mov    %edx,0xc(%rsp)
   7:	48 89 34 24          	mov    %rsi,(%rsp)
   b:	89 7c 24 08          	mov    %edi,0x8(%rsp)
   f:	e8 eb c7 f4 ff       	call   0xfffffffffff4c7ff
  14:	8b 54 24 0c          	mov    0xc(%rsp),%edx
  18:	48 8b 34 24          	mov    (%rsp),%rsi
  1c:	41 89 c0             	mov    %eax,%r8d
  1f:	8b 7c 24 08          	mov    0x8(%rsp),%edi
  23:	b8 2a 00 00 00       	mov    $0x2a,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 35                	ja     0x67
  32:	44 89 c7             	mov    %r8d,%edi
  35:	89 44 24 08          	mov    %eax,0x8(%rsp)
  39:	e8 41 c8 f4 ff       	call   0xfffffffffff4c87f
  3e:	8b                   	.byte 0x8b
  3f:	44                   	rex.R

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 35                	ja     0x3d
   8:	44 89 c7             	mov    %r8d,%edi
   b:	89 44 24 08          	mov    %eax,0x8(%rsp)
   f:	e8 41 c8 f4 ff       	call   0xfffffffffff4c855
  14:	8b                   	.byte 0x8b
  15:	44                   	rex.R
[   25.443718][  T241] RSP: 002b:00007f342296fbf0 EFLAGS: 00000293 ORIG_RAX: 000000000000002a
[   25.443940][  T241] RAX: ffffffffffffffda RBX: 000000000000001c RCX: 00007f34232c440b
[   25.444158][  T241] RDX: 000000000000001c RSI: 00007f342296fc40 RDI: 000000000000000a
[   25.444377][  T241] RBP: 000000000000000a R08: 0000000000000000 R09: 00000000ffffffff
[   25.444594][  T241] R10: 00007f342317c598 R11: 0000000000000293 R12: 0000000000410270
[   25.444810][  T241] R13: 0000000000000005 R14: 00007f342296fc40 R15: ffffffffffffffe0
| [   25.450143][  T241] 1 lock held by restore_ipv6/241:
| [ 25.450293][ T241] #0: ffff888006071098 (sk_lock-AF_INET6){+.+.}-{0:0}, at: inet_stream_connect (net/ipv4/af_inet.c:748) 
| [   25.450571][  T241]
| [   25.450571][  T241] stack backtrace:
[   25.451012][  T241] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   25.451343][  T241] Call Trace:
[   25.451460][  T241]  <TASK>
[ 25.451541][ T241] dump_stack_lvl (lib/dump_stack.c:123) 
[ 25.451700][ T241] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 25.451854][ T241] tcp_ao_finish_connect (net/ipv4/tcp_ao.c:1183 (discriminator 7)) 
[ 25.452006][ T241] tcp_finish_connect (net/ipv4/tcp_input.c:6340) 
[ 25.452159][ T241] tcp_rcv_synsent_state_process (net/ipv4/tcp_input.c:6576) 
[ 25.452345][ T241] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 25.452496][ T241] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 25.452614][ T241] ? __pfx_tcp_rcv_synsent_state_process (net/ipv4/tcp_input.c:6455) 
[ 25.452800][ T241] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 25.452988][ T241] ? kvm_clock_get_cycles (./arch/x86/include/asm/preempt.h:94 arch/x86/kernel/kvmclock.c:80 arch/x86/kernel/kvmclock.c:86) 
[ 25.453139][ T241] ? ktime_get (kernel/time/timekeeping.c:195 (discriminator 4) kernel/time/timekeeping.c:395 (discriminator 4) kernel/time/timekeeping.c:403 (discriminator 4) kernel/time/timekeeping.c:850 (discriminator 4)) 
[ 25.453260][ T241] tcp_rcv_state_process (net/ipv4/tcp_input.c:6796) 
[ 25.453409][ T241] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 25.453556][ T241] ? __release_sock (./include/net/sock.h:1121 net/core/sock.c:3077) 
[ 25.453708][ T241] ? __pfx_tcp_rcv_state_process (net/ipv4/tcp_input.c:6751) 
[ 25.453892][ T241] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 25.454042][ T241] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 25.454165][ T241] tcp_v6_do_rcv (net/ipv6/tcp_ipv6.c:1676) 
[ 25.454316][ T241] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 25.454503][ T241] __release_sock (net/core/sock.c:3079) 
[ 25.454659][ T241] release_sock (net/core/sock.c:3633) 
[ 25.454814][ T241] inet_stream_connect (net/ipv4/af_inet.c:751) 
[ 25.454965][ T241] __sys_connect (net/socket.c:2071 net/socket.c:2088) 
[ 25.455116][ T241] ? __pfx___sys_connect (net/socket.c:2078) 
[ 25.455264][ T241] ? do_fcntl (fs/fcntl.c:473) 
[ 25.455383][ T241] ? __fget_files (fs/file.c:1009) 
[ 25.455537][ T241] ? __pfx___rseq_handle_notify_resume (kernel/rseq.c:316) 
[ 25.455729][ T241] __x64_sys_connect (net/socket.c:2095) 
[ 25.455883][ T241] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 25.456034][ T241] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   25.456219][  T241] RIP: 0033:0x7f34232c440b
[ 25.456374][ T241] Code: 83 ec 18 89 54 24 0c 48 89 34 24 89 7c 24 08 e8 eb c7 f4 ff 8b 54 24 0c 48 8b 34 24 41 89 c0 8b 7c 24 08 b8 2a 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 08 e8 41 c8 f4 ff 8b 44
All code
========
   0:	83 ec 18             	sub    $0x18,%esp
   3:	89 54 24 0c          	mov    %edx,0xc(%rsp)
   7:	48 89 34 24          	mov    %rsi,(%rsp)
   b:	89 7c 24 08          	mov    %edi,0x8(%rsp)
   f:	e8 eb c7 f4 ff       	call   0xfffffffffff4c7ff
  14:	8b 54 24 0c          	mov    0xc(%rsp),%edx
  18:	48 8b 34 24          	mov    (%rsp),%rsi
  1c:	41 89 c0             	mov    %eax,%r8d
  1f:	8b 7c 24 08          	mov    0x8(%rsp),%edi
  23:	b8 2a 00 00 00       	mov    $0x2a,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 35                	ja     0x67
  32:	44 89 c7             	mov    %r8d,%edi
  35:	89 44 24 08          	mov    %eax,0x8(%rsp)
  39:	e8 41 c8 f4 ff       	call   0xfffffffffff4c87f
  3e:	8b                   	.byte 0x8b
  3f:	44                   	rex.R

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 35                	ja     0x3d
   8:	44 89 c7             	mov    %r8d,%edi
   b:	89 44 24 08          	mov    %eax,0x8(%rsp)
   f:	e8 41 c8 f4 ff       	call   0xfffffffffff4c855
  14:	8b                   	.byte 0x8b
  15:	44                   	rex.R
[   25.456894][  T241] RSP: 002b:00007f342296fbf0 EFLAGS: 00000293 ORIG_RAX: 000000000000002a
[   25.457121][  T241] RAX: ffffffffffffffda RBX: 000000000000001c RCX: 00007f34232c440b
[   25.457342][  T241] RDX: 000000000000001c RSI: 00007f342296fc40 RDI: 000000000000000a
[   25.457563][  T241] RBP: 000000000000000a R08: 0000000000000000 R09: 00000000ffffffff
[   25.457791][  T241] R10: 00007f342317c598 R11: 0000000000000293 R12: 0000000000410270
[   25.458013][  T241] R13: 0000000000000005 R14: 00007f342296fc40 R15: ffffffffffffffe0
| [   25.486363][  T241] 1 lock held by restore_ipv6/241:
| [ 25.486516][ T241] #0: ffff888006073a98 (sk_lock-AF_INET6){+.+.}-{0:0}, at: do_tcp_setsockopt (net/ipv4/tcp.c:3809) 
| [   25.486812][  T241]
| [   25.486812][  T241] stack backtrace:
[   25.487237][  T241] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   25.487555][  T241] Call Trace:
[   25.487664][  T241]  <TASK>
[ 25.487741][ T241] dump_stack_lvl (lib/dump_stack.c:123) 
[ 25.487888][ T241] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 25.488034][ T241] tcp_ao_set_repair (net/ipv4/tcp_ao.c:2399 (discriminator 7)) 
[ 25.488176][ T241] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 25.488375][ T241] ? __pfx_tcp_ao_set_repair (net/ipv4/tcp_ao.c:2371) 
[ 25.488528][ T241] do_tcp_setsockopt (net/ipv4/tcp.c:3924) 
[ 25.488676][ T241] ? __pfx_do_tcp_setsockopt (net/ipv4/tcp.c:3705) 
[ 25.488823][ T241] ? __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 25.488975][ T241] ? find_held_lock (kernel/locking/lockdep.c:5315) 
[ 25.489122][ T241] ? __lock_release (kernel/locking/lockdep.c:5501) 
[ 25.489264][ T241] ? __fget_files (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 fs/file.c:1006) 
[ 25.489409][ T241] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 25.489553][ T241] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5790) 
[ 25.489697][ T241] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 25.489844][ T241] do_sock_setsockopt (net/socket.c:2334) 
[ 25.489998][ T241] ? __pfx_do_sock_setsockopt (net/socket.c:2303) 
[ 25.490150][ T241] ? fdget (fs/file.c:1121 fs/file.c:1128) 
[ 25.490263][ T241] __sys_setsockopt (./include/linux/file.h:35 net/socket.c:2359) 
[ 25.490407][ T241] ? __pfx___sys_setsockopt (net/socket.c:2347) 
[ 25.490548][ T241] ? __fget_files (fs/file.c:1009) 
[ 25.490693][ T241] ? __pfx___sys_socket (net/socket.c:1712) 
[ 25.490841][ T241] __x64_sys_setsockopt (net/socket.c:2363) 
[ 25.490983][ T241] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 25.491161][ T241] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 25.491305][ T241] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   25.491481][  T241] RIP: 0033:0x7f34232c491e
[ 25.491628][ T241] Code: 0f 1f 40 00 48 8b 15 e1 94 0a 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b1 0f 1f 00 f3 0f 1e fa 49 89 ca b8 36 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 0a c3 66 0f 1f 84 00 00 00 00 00 48 8b 15 a9
All code
========
   0:	0f 1f 40 00          	nopl   0x0(%rax)
   4:	48 8b 15 e1 94 0a 00 	mov    0xa94e1(%rip),%rdx        # 0xa94ec
   b:	f7 d8                	neg    %eax
   d:	64 89 02             	mov    %eax,%fs:(%rdx)
  10:	48 c7 c0 ff ff ff ff 	mov    $0xffffffffffffffff,%rax
  17:	eb b1                	jmp    0xffffffffffffffca
  19:	0f 1f 00             	nopl   (%rax)
  1c:	f3 0f 1e fa          	endbr64
  20:	49 89 ca             	mov    %rcx,%r10
  23:	b8 36 00 00 00       	mov    $0x36,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 0a                	ja     0x3c
  32:	c3                   	ret
  33:	66 0f 1f 84 00 00 00 	nopw   0x0(%rax,%rax,1)
  3a:	00 00 
  3c:	48                   	rex.W
  3d:	8b                   	.byte 0x8b
  3e:	15                   	.byte 0x15
  3f:	a9                   	.byte 0xa9

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 0a                	ja     0x12
   8:	c3                   	ret
   9:	66 0f 1f 84 00 00 00 	nopw   0x0(%rax,%rax,1)
  10:	00 00 
  12:	48                   	rex.W
  13:	8b                   	.byte 0x8b
  14:	15                   	.byte 0x15
  15:	a9                   	.byte 0xa9
[   25.492128][  T241] RSP: 002b:00007f342296f9c8 EFLAGS: 00000202 ORIG_RAX: 0000000000000036
[   25.492344][  T241] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f34232c491e
[   25.492557][  T241] RDX: 000000000000002a RSI: 0000000000000006 RDI: 0000000000000009
[   25.492766][  T241] RBP: 0000000000000009 R08: 0000000000000010 R09: 0000000000000064
[   25.492977][  T241] R10: 00007f342296fca0 R11: 0000000000000202 R12: 00007f342296fb20


Finger prints:
lockdep_rcu_suspicious:tcp_ao_do_lookup:tcp_connect:tcp_v6_connect:__inet_stream_connect
lockdep_rcu_suspicious:tcp_ao_finish_connect:tcp_finish_connect:tcp_rcv_synsent_state_process:tcp_rcv_state_process
lockdep_rcu_suspicious:tcp_ao_copy_mkts_to_user:do_tcp_getsockopt:tcp_getsockopt:do_sock_getsockopt
lockdep_rcu_suspicious:tcp_ao_set_repair:do_tcp_setsockopt:do_sock_setsockopt:__sys_setsockopt